Franklin claimed to have heard and understood the conversation of ephemera, a type of?

 The correct answer is : insect

Explanation:  The ephemera is an insect with a very short life, measured in minutes. The duration of the adult life of this insect is maximum 24 hours, the males make a synchronized flight to attract the females. They mate in the air, then the male falls into the water and dies and the female lays the eggs and also dies.

it ends with a marriage, but also with prospero giving up his power.

the tempest is a play written by william shakespeare between 1610-1611, it narrates the story of prospero a magician that sets a storm to wreck a ship, this sets the story to kill the king of naples. while it is a romantic style play, it isn´t traditional because of the ending, it end with the marriage and the magician giving up his powers.

the noun in this is person